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Finding the Fourth Proportional to 1,481.36, 2,220.41 and 749.32

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Solution

The fourth proportional to 1,481.36, 2,220.41 and 749.32 is: 1,123.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.36 : 2,220.41 = 749.32 : x
  2. Step 2: Convert to fraction form
    1,481.36/2,220.41 = 749.32/x
  3. Step 3: Cross multiply
    1,481.36x = 2,220.41 × 749.32
  4. Step 4: Simplify right side
    1,481.36x = 1,663,793.94
  5. Step 5: Solve for x
    x = 1,663,793.94/1,481.36
  6. Step 6: Final answer
    x = 1,123.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.